My doc recommended me to have medroxyprogesterone since i did not had my periods for 2 months now bt its been more than 10 days ive still not got my periods what would be the reason .?

Secondary amenorrhea (absent periods) is defined as a period of no periods for 3 months or previously for 6 months, having pregnancy ruled out. Causes include outflow tract abnormalities, primary ovarian insufficiency, hypothalamic or pituitary disorders, other endocrine gland disorders, chronic disease, physiologic, or induced. Provera hormone challenge can be used, but the value is inconsistent